Blower



Dec. 30, 1930. E. L. ANDERSON 1,787,062

BLOWER Filed March 29, 1929 6 Sheets-Sheet 1 INVEN'I'OR fDWAZD L. ANDERSON.

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E. L. ANDERSON BLOWER Filed March 29, 1929 6 Sheets-Sheet 6 I NVE NTO R :wmzp 4 mwszsom ex ensive to install.

Patented Dec. 30, 1930 UNITED STATES PATENT OFFICE EDWARD L. ANDERSON, OF GROSSE ILE, MICHIGAN, ASSIGNOR TO AMERICAN BLOWER CORPORATION, OE DETROIT, MICHIGAN, A CORPORATION OF DELAWARE BLOWER Application filed- March 29, 1929. Serial No. 351,079.

My invention relates to blowers.

It is the particular object of my invention to provide means of securin a maximum delivery of air from a given size blower utilizing a'given size motor for driving the blower,

preferably at constant speed.

It is my object to eliminate complicated electrical equipment, electric controls and the like, which are both diflic'ult to maintain and t is a further object of my invention to provide a dual inlet radial delivery fan by which air can be taken in and discharged in parallel planes through fans of varying lat- 5 eral dimensions.

In particular, it is my object to provide such an installation so that the dead area in the upper half of the fan and the upper half of the casing will be eliminated.

It is a further object of providing a fan in which the inlet may be varied or completely shut ofi on either side of the inlet of the .fan without modifying the speed of rotation of the fan to therebysecure a variable air delivery with a constant fan speed and constant motor speed.

' Referring to the drawings:

Figure 1 is a front elevationof a typical fan' installation;

Figure 2 is a vertical section therethrough; Figure 3 is a detailed vertical section of one-half of the fan showing the dampers in vertical section;

- Figure 4 is a section on the line 44 of Figure 3; V

Figure 5 is a section similar to Figure 3 with the damper and guide vanes in closed position;

Figure 6 is a detailed view of one end of the guide vanes;

Figure 7 is a side elevation. v

Referring to the drawin s in detail, I provide a pair of spaced in et passageways 1 and 2. These passageways are vertically dis- 0 shaft 6. This fan is provided with a pluralposed at their bottoms and laterally disposed ity of fan blades 7 which are adapted to take in the air internally parallel to the fan blades ma or axis and discharge the air radially at r1g t angles to the major axis of the fan blades. This discharge of the air radially of the fan blades results in the air being delivered into the scroll outlet casing 8.

Heretofore, the areas marked A and B generally above the shaft 6 in the upper ends of the inlet passageways for the air have been so called dead air areas where the back pressure made it substantially impossible to move the air.

Hence, the major portion of the work b the fan was executed by that portion of. the fan lying below the shaft 6.

If the fan speed were decreased this difliculty would increase.

By my invention I provide a constant speed fan with a constant speed motor or any other source of power delivering a constant speed,

I provide in each leg of the inlet passageway a plurality of streamline, parallel vanes stationarily mounted so that they can be moved as a unit in the inlet passageway for guiding the air evenly throughout the passageway and directing the air into the dead airspace so as to overcome any tendency to turbulence, back pressure or other reasons by which the air is prevented from freely circuiting and moving through the sides of the fan into the upper half thereof whence it may be discharged radially thus giving full effect to the entire fan.

These guide vanes are designated 9 and are so curved as to follow the angular flow through the inlet pasageways 1 and 3 and 2 and 4, so that the air stream will conform to and be equally distributed in the inlet passageway. The inlet and exit edges of these 7 blades or guide vanes are arranged to be aerosageways. By the movement of these shafts the guide vanes 9 may be positioned at any angle with respect to the air stream that may be desired to both control its direction and its quantity.

Also mounted upon this pair of spaced disks is another outer guide vane 14 which is projected below the disks as at 15 and is supported by the brackets 16 carried on the disks. This vane serves as a damper which, when moved to the dotted line position as shown in Figure 3, can completely close oif one of the inlet legs. It may be adjusted in any intermediate position for controlling the volume of air and thus control the amount of air that makes its exit from the fan without the necessity of varying the fan or motor speed.

The axis of entry through the inlet legs is the line XX. Longitudinal axis of the fan blade is the line YY'. The axis of air delivery is the line ZZ. Thus, the line of inlet and the line of deliver are both parallel. The longi- 20 tudinal axis 0 the fan blade is at right angles to the lineof delivery. The line SS is the axis of entrance-of the air into the fan which is at right angles to its line of inlet into the casing and at right angles to the line of outlet T from the fan. The outlet opening 17 may be positioned in any direction, as desired.

It will'be understood that I desire to comprehend within my invention such modifications as may be necessary to adapt it to varying conditions and uses.

Havin thus fully described my invention, what I c aim as new and desire to secure by LettersPaten't, is:

' 1. In combination in a fan, a casing therefor having an inlet passageway, a plurality of spaced .guide vanes in said passageway,

spaced-plates for supporting the ends of said guide vanes leaving the space therebetween free for the passage of air, means for rotat- 40 ably mounting said-plates and said vanes in the passageway so that they may be adjusted rotatably with respect to the passageway, a damper guide vane depending from said end plates adapted when rotated with the end plates to cut ofi the flow of air through the inlet passageway.

.2. In combination, a fan, an angular inlet passageway to said fan, a rotatable means mounted in the angle of said angular passageway for guiding air through the passageway around the angle thereof into said fan.

3. In combination, a fan, an angular inlet passageway to said fan, a rotatable means mounted in'the angle of said angular passagewayfor guiding air through the passageway around the angle thereof into said fan, said means comprising guide vanes.

4. In combination, a fan, an angular inlet passageway to said fan, a rotatable means mounted in the angle of said angular passageway for guiding air through the passageway around the angle thereof into said fan, said means comprising guide vanes, said guide vanes being arranged in spaced parallel relation ship and movable together rotatably as a unit.

5. In combination, a fan, an angular inlet passageway to said fan, a rotatable means mounted in the angle of said angular passageway for guiding air through the passageway around the angle thereof into said fan, and means movable with said rotatable guiding means for restricting the flow of air.

6. In combination, a fan having a side inlet ,and a radial delivery, an angular air inlet passageway, a rotatable means for uniformly distributing air into the fan and guiding it through the angle of said passageway located in said angle.

7 In combination, a fan having a side inlet and a radial delivery, an angular air inlet passageway, a rotatable means for uniformly distributing air into the fan and guiding it through the angle of said passageway located in said angle, said rotatable means comprising a plurality of spaced guide vanes curved to follow the angular turn of the inlet passageway to guide air therethrough in parallel itreams around the angle thereof into the 8. In combination, a fan having a side inlet and a radial delivery, an angular air inlet passageway, a rotatable means for uniformly distributing air into the fan and guiding it through the angle of said passageway located'in said angle, said rotatable means comprising a plurality of spaced guide vanes curved to follow the angular turn of the inlet passageway to .guide air therethrough in parallel streams around the angle thereof into the fan, one of said guide vanes being adapted to 'span transversely the inlet passagewayand to act as a damper on the passage of air therethrough.

9. In combination, a fan, an angular inlet passageway to said fan, a rotatable means mounted in the angle of said angular passageway for guiding air through the passage; way aroundthe angle thereof into said fan, said guiding means having a portion thereof streamlined to facilitate the passage of air thereover. 1

10. In combination, a fan, an angular inlet passageway to said fan, a rotatable means mounted in the angle of said angular passageway for guiding air through the passageway around the angle thereof into said fan, and a side inlet radial delivery scroll cas-' ing surrounding said fan having its inlet connected to said'inlet passageway.

11. In combination, a side inlet radial delivery fan, a scroll casing having side inlets and a radial delivery passageway, angular side inlet passageways connected to said fan'and scroll casing, rotatable means mounted in the angle of said angular passageways adapted to guide the air through the passage- 'ways around the angle thereof into thefan and to evenly distribute it'into said fan.

12. In combination, a side inlet radial delivery fan, a scroll casing having side inlets and a tangential delivery passagewa angular side inlet passageways connecte to said fan and scroll casing, rotatable means mounted in the angle of said angular passageways adapted to guide the air through the passageways around the angle thereof into the fan and to evenly distribute it into said fan, and damper means associated with and movable with said rotatable means for controlling the flow of air through the respective passageways.

In testimony whereof, I afiix my signature.

EDWARD L. ANDERSON. 

